This looks like another installer who had his head up.... [where he shouldn't].
Ok, so theres coax running to the CCK-W so that suggests you have a receiver DECA too or something's not hooked up right. Is the ethernet cable going from the receiver to the CCK-W or the black rectangular as yet unidentified box?
HR21 to DECA to WCCK to router, but should be:
HR21 [ethernet[ to WCCK, that DOESN'T have the coax connected to it.